h8s-2138 Renesas Electronics Corporation., h8s-2138 Datasheet - Page 725

• Manufacturer Part Number: h8s-2138
• Description: Renesas 16-bit Single-chip Microcomputer H8s Family/h8s/2100 Series
• Manufacturer: Renesas Electronics Corporation.

23.2.2
LPWRCR is an 8-bit readable/writable register that performs power-down mode control.
Only bit 4 is described here. For a description of the other bits, see section 24.2.2, Low-Power
Control Register (LPWRCR).
LPWRCR is initialized to H'00 by a reset and in hardware standby mode. It is not initialized in
software standby mode.
Bit 4—Subclock Input Enable (EXCLE): Controls subclock input from the EXCL pin.
Bit 2
SCK2
0
1
Bit 4
EXCLE
0
1
Bit
Initial value
Read/Write
Low-Power Control Register (LPWRCR)
Bit 1
SCK1
0
1
0
1
Description
Subclock input from EXCL pin is disabled
Subclock input from EXCL pin is enabled
DTON
R/W
Bit 0
SCK0
0
1
0
1
0
1
—
7
0
LSON
R/W
6
0
Bus master is in high-speed mode
Medium-speed clock is /2
Medium-speed clock is /4
Medium-speed clock is /8
Medium-speed clock is /16
Medium-speed clock is /32
—
Description
NESEL
R/W
5
0
EXCLE
R/W
4
0
Rev. 4.00 Jun 06, 2006 page 671 of 1004
—
—
3
0
Section 23 Clock Pulse Generator
—
—
2
0
REJ09B0301-0400
—
—
1
0
(Initial value)
(Initial value)
—
—
0
0